Manual three-way electric proportional flow control valve

Abstract

The utility model relates to a manual three-way electric proportional flow control valve, which comprises a valve sleeve, a flux sleeve, a plug screw, a coil and an elastic component, the valve sleeve is fixedly connected with the flux sleeve through the plug screw, the coil is sleeved outside the flux sleeve, a moving iron is movably arranged in the flux sleeve, the flux sleeve is in threaded connection with a control rod, and the control rod is connected with the elastic component. An oil inlet is formed in the end, away from the flux sleeve, of the valve sleeve, an oil outlet is formed in the side wall of the valve sleeve, a guide sleeve is fixedly arranged in the valve sleeve, an adjusting outlet communicated with the oil outlet is formed in the side wall of the guide sleeve, and a proportional control valve element is movably arranged in the guide sleeve. The proportional control valve element can be used for covering and sealing the adjusting outlet, the proportional control valve element is connected with the moving iron, the elastic assembly is used for pushing the proportional control valve element to move towards the side far away from the flux sleeve, the manual adjustment function and the electric actuator control function are achieved at the same time, the structure is simple, and manual and automatic switching is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to flow control device technical field, especially a three -way electric proportional flow control valve with manual. BACKGROUND

[0002] In industrial automation and process control, flow control valves are widely used to adjust the flow amount of medium (such as gas or liquid) in the pipeline. Traditional flow control valves mostly adopt a single control mode, either manual adjustment or proportional control through electrical signals. Although the flow control valve with manual adjustment has a simple structure, it is inconvenient to operate and difficult to achieve high-precision control in complex working conditions requiring precise flow control. Although the flow control valve with electric proportional control can achieve relatively precise flow adjustment, it cannot be effectively operated manually in emergency when the electrical system fails, which may cause the entire hydraulic system to be paralyzed. Although there are control valves on the market that can simultaneously have manual adjustment and electric actuator control, most of them have a complex structure, high manufacturing cost, and inconvenient switching process, which affects the response speed of the system. SUMMARY

[0003] The utility model provides a three -way electric proportional flow control valve with manual, solves the above -mentioned problems existing in the use process in the prior art.

[0004] The technical scheme of the utility model is as follows: a three -way electric proportional flow control valve with manual, including valve sleeve, magnetic sleeve, screw plug, coil and elastic component, valve sleeve and magnetic sleeve are fixedly connected through screw plug, the coil is set outside the magnetic sleeve, the movable iron is arranged in the magnetic sleeve, the control rod is connected with the end of the magnetic sleeve away from the valve sleeve, the cylindrical pin is fixedly connected on the movable iron, the control rod is set with the movable port on the end close to the movable iron, the cylindrical pin is slidably connected on the movable port, the oil inlet is set on the end of the valve sleeve away from the magnetic sleeve, the oil outlet is set on the side wall of the valve sleeve, the guide sleeve is fixedly arranged in the valve sleeve, the adjusting outlet is set on the side wall of the guide sleeve and is communicated with the oil outlet, the proportional control valve core is movably arranged in the guide sleeve, the proportional control valve core can be used to form covering seal to the adjusting outlet, the proportional control valve core is connected with the movable iron, and the elastic component is used to push the proportional control valve core to move away from the magnetic sleeve.

[0005] Preferably, the movable iron is fixedly connected with a connecting rod, and the end of the proportional control valve core close to the movable iron is rotatably connected with a rotating shaft, and the rotating shaft is connected with the connecting rod.

[0006] Preferably, the elastic component includes a first spring in the movable iron, and the two ends of the first spring are respectively abutted on the control rod and the connecting rod.

[0007] Preferably, the magnetic guide sleeve is fixedly provided with a first spring seat on the inner side of the screw plug, one end of the first spring seat abuts against the guide sleeve, the elastic assembly comprises a second spring located in the first spring seat, and two ends of the second spring abut between the first spring seat and the proportional control spool and are used to push the proportional control spool to move away from the magnetic guide sleeve.

[0008] Preferably, one end of the control rod located on the outer side of the magnetic guide sleeve is fixedly connected with a knob.

[0009] Preferably, a bypass port is further formed in the outer side wall of the valve sleeve, the bypass port is located between the oil liquid outlet and the oil liquid inlet, a bypass spool is movably arranged in the valve sleeve, and a third spring is arranged in the valve sleeve and used to push the bypass spool to cover and seal the bypass port.

[0010] Preferably, a second spring seat is fixedly connected to one end of the guide sleeve close to the oil liquid inlet, one end of the third spring abuts against the second spring seat and the guide sleeve, and the other end of the third spring abuts against the bypass spool, and a stop ring is further arranged on the inner side wall of the valve sleeve and used to abut against one end of the bypass spool close to the oil liquid inlet.

[0011] In summary, the beneficial effects of the present application are as follows:

[0012] 1. The present application combines a manual valve and an electromagnetic valve to control the proportional control spool, so as to control the flow rate of the medium flowing into the oil liquid inlet and flowing out of the oil liquid outlet, the present application provides a three-way electric proportional flow control valve which can accurately adjust the flow rate under normal operating conditions and can quickly perform emergency operation in manual mode when power or control system fails. This design improves the reliability and safety of the system, and at the same time, the structure is compact and simple, and the manufacturing cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0014] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0015] In the figure: 1. Valve sleeve; 11. Oil inlet; 12. Oil outlet; 13. Bypass port; 21. Magnetic sleeve; 22. Coil; 23. Moving iron; 3. Plug; 4. Control rod; 41. Movable port; 42. Cylindrical pin; 43. Knob; 5. Guide sleeve; 51. Adjustment outlet; 6. Proportional control valve core; 7. Connecting rod; 71. Rotating shaft; 81. First spring; 82. First spring seat; 83. Second spring; 84. Third spring; 85. Second spring seat; 9. Bypass valve core; 10. Retaining ring. DETAILED DESCRIPTION

[0016] The following is a combination of the appended examples of the present invention Figure 1 , clearly and completely describes the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0017] Example:

[0018] like Figure 1 As shown, the utility model discloses a three-way electric proportional flow control valve with manual operation, including a valve sleeve 1, a magnetic sleeve 21, a screw plug 3, a coil 22 and an elastic component, wherein the valve sleeve 1 and the magnetic sleeve 21 are threadedly fixedly connected by the screw plug 3, the coil 22 is sleeved outside the magnetic sleeve 21, and a movable iron 23 is movably arranged inside the magnetic sleeve 21, and the end of the magnetic sleeve 21 away from the valve sleeve 1 is threadedly connected to a control rod 4, the end of the control rod 4 located outside the magnetic sleeve 21 is fixedly connected to a knob 43, and a cylindrical pin 42 is fixedly connected to the movable iron 23, and a movable opening 41 is opened on the end of the control rod 4 close to the movable iron 23, and the cylindrical pin 42 is slidably fitted in the movable opening 4 1, that is, the moving iron 23 can slide relatively within a certain range relative to the control rod 4. In addition, an oil inlet 11 is provided at the end of the valve sleeve 1 away from the magnetic sleeve 21, and an oil outlet 12 is provided on the side wall of the valve sleeve 1. A guide sleeve 5 is fixedly arranged in the valve sleeve 1, and an adjustment outlet 51 connected to the oil outlet 12 is provided on the side wall of the guide sleeve 5. In addition, a proportional control valve core 6 is movably arranged in the guide sleeve 5. The proportional control valve core 6 can be used to form a covering seal for the adjustment outlet 51. The proportional control valve core 6 is connected to the moving iron 23, and the elastic component is used to push the proportional control valve core 6 to move toward the side away from the magnetic sleeve 21.

[0019] The specific structure that the proportional control valve core 6 is connected with the moving iron 23 is that the connecting rod 7 is fixedly connected in the moving iron 23, and the rotating shaft 71, which is connected with the one end of the proportional control valve core 6, is rotatably connected on the connecting rod 7, which allows the proportional control valve core 6 to have a certain precision deviation with the moving iron 23, reduces the wear of the proportional control valve core 6 and the guide sleeve 5 due to the fact that the proportional control valve core 6 and the moving iron 23 are not completely coaxial.

[0020] The elastic assembly comprises the first spring 81 in the moving iron 23, the two ends of the first spring 81 are abutted on the control rod 4 and the connecting rod 7 respectively, the first spring 81 pushes the moving iron 23 away from the control rod 4, and the moving iron 23 drives the proportional control valve core 6 to move through the connecting rod 7. The design of the first spring 81 not only provides necessary restoring force, guarantees that the proportional control valve core 6 can automatically return to the initial position to seal the oil outlet 12 in the absence of external force, and in addition, the first spring seat 82 is fixedly arranged on the inner side of the guide sleeve 21 and the screw plug 3, one end of the first spring seat 82 is abutted on the guide sleeve 5, the elastic assembly further comprises the second spring 83 in the first spring seat 82, the two ends of the second spring 83 are abutted between the first spring seat 82 and the proportional control valve core 6 and are used for driving the proportional control valve core 6 to move away from the side of the guide sleeve 21, the second spring seat 85 and the second spring 83 are arranged to further optimize the function of the elastic assembly, especially for the function of driving the proportional control valve core 6 to move away from the side of the guide sleeve 21, which is more obvious, and ensures that the quick and reliable sealing can be realized even in a high-pressure environment, and the working efficiency of the system is improved.

[0021] The working principle of the utility model is that medium enters from the oil inlet 11, the coil 22 generates a magnetic field after receiving the electric signal from the controller, the moving iron 23 is attracted to move towards the guide sleeve 21, the cylindrical pin 42 on the moving iron 23 slides along the movable port 41 on the control rod 4, and the moving iron 23 drives the proportional control valve core 6 to move towards the guide sleeve 21 through the connecting rod 7, so that the adjusting outlet 51 is opened, the medium flowing out of the adjusting outlet 51 flows out of the oil outlet 12, the larger the adjusting outlet 51 is opened, the more medium flows through the adjusting outlet 51, so that the accurate control of flow is realized, and when the coil 22 is powered off, the moving iron 23, the connecting rod 7 and the proportional control valve core 6 are reset to reseal the adjusting outlet 51 through the action of the first spring 81 and the second spring 83. When manual adjustment is needed or when the electrical system fails, the knob 43 at the end of the control rod 4 is rotated, one end of the knob 43 on the push rod is away from the guide sleeve 21, the position of the moving iron 23 and the proportional control valve core 6 is directly controlled, manual adjustment of flow is realized, and it is very simple.

[0022] In the utility model, bypass mouth 13 is further formed in the outer side wall of valve sleeve 1, bypass mouth 13 is located between oil liquid outlet 12 and oil liquid inlet 11, bypass valve core 9 is movably arranged in valve sleeve 1, and third spring 84 for pushing bypass valve core 9 to form covering seal to bypass mouth 13 is further arranged in valve sleeve 1.Further, the one end of guiding sleeve 5 close to oil liquid inlet 11 is fixedly connected with second spring seat 85, one end of third spring 84 abuts on second spring seat 85 and guiding sleeve 5, and the other end abuts on bypass valve core 9, and the inner side wall of valve sleeve 1 is further provided with stop ring 10 for forming abutment to the one end of bypass valve core 9 close to oil liquid inlet 11.The bypass path formed by bypass mouth 13 and bypass valve core 9 can be used in special conditions, when the pressure in valve sleeve 1 is too large, third spring 84 can be compressed to push bypass valve core 9 close to guiding sleeve 5, so as to open bypass mouth 13, and the medium entering from oil liquid inlet 11 can exit from bypass mouth 13, and the structure increases the adaptability and reliability of the system.

[0023] Meanwhile, it needs to be pointed out that the terms indicated in the utility model, such as "front", "rear", "vertical", "horizontal", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for facilitating the description of the utility model and simplifying the description, and are not for indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as the limitation on the protection scope of the utility model.

[0024] The above only describes the preferred embodiment of the utility model, and is not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A manually operated three-way electro-proportional flow control valve characterized by: The utility model provides a valve sleeve, magnetic yoke, screw plug, coil and elastic assembly, the valve sleeve with magnetic yoke is fixedly connected through screw plug, the coil is set outside magnetic yoke, the magnetic yoke is movably provided with moving iron in, the end of magnetic yoke away from valve sleeve is threadedly connected with control rod, the moving iron is fixedly connected with cylindrical pin on, the control rod is set with movable mouth on the end close to moving iron, the cylindrical pin is slippage cooperation on movable mouth, the end of valve sleeve away from magnetic yoke is set with oil inlet, the lateral wall of valve sleeve is set with oil outlet, the valve sleeve is fixedly provided with guide sleeve in, the lateral wall of guide sleeve is set with the adjustment outlet that communicates with oil outlet, the guide sleeve is movably provided with proportional control valve core in, the proportional control valve core can be used to form the covering seal of adjustment outlet, the proportional control valve core is connected with moving iron, and the elastic assembly is used to push proportional control valve core and move to the side away from magnetic yoke.

2. A three-way electric proportional flow control valve with manual according to claim 1, characterized in that: The moving iron is fixedly connected with connecting rod, and the proportional control valve core is rotatably connected with a rotating shaft at one end thereof close to the moving iron.

3. A three-way electric proportional flow control valve with manual according to claim 2, characterized in that: The elastic assembly includes a first spring located in the moving iron, and two ends of the first spring are respectively abutted against the control rod and the connecting rod.

4. A three-way electric proportional flow control valve with manual according to claim 1 or 3, characterized in that: The magnetic yoke and the screw plug are fixedly provided with a first spring seat inside, one end of the first spring seat is abutted against the guide sleeve, the elastic assembly includes a second spring located in the first spring seat, and two ends of the second spring are abutted between the first spring seat and the proportional control valve core and used to push the proportional control valve core to move to the side away from the magnetic yoke.

5. The manually operated three-way electro-proportional flow control valve according to claim 1, characterized in that: One end of the control rod outside the magnetic yoke is fixedly connected with a knob.

6. A manually operated three-way electro-proportional flow control valve according to claim 1, characterized in that: The lateral wall of the valve sleeve is further provided with a bypass opening between the oil outlet and the oil inlet, the valve sleeve movably accommodates a bypass valve core, and the valve sleeve further has a third spring used to push the bypass valve core to form a covering seal of the bypass opening.

7. A three-way electric proportional flow control valve with manual according to claim 6, characterized in that: One end of the guide sleeve close to the oil inlet is fixedly connected with a second spring seat, one end of the third spring is abutted against the second spring seat and the guide sleeve, and the other end is abutted against the bypass valve core, and the inner lateral wall of the valve sleeve further has a stop ring used to abut against one end of the bypass valve core close to the oil inlet.

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